# PFD Calc vs Animal math training

The clearest difference is update cadence: Animal math training at fortnightly against PFD Calc's every 5 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PFD Calc ships an update every 5 weeks, Animal math training fortnightly. The most recent releases landed on September 17, 2026 and May 15, 2026 respectively.

## The numbers

| Metric | PFD Calc | Animal math training |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Size | 14 MB | 266 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kazuhisa Kobayashi](https://appshunter.io/developer/1580882000) | [Shoichi Imamura](https://appshunter.io/developer/603378476) |

## What reviewers say

### PFD Calc

[App page](https://appshunter.io/ios/app/pfd-calc-prime-factorization/id6737405828)

**Features:** macOS Compatibility

**In-app purchases:** none


### Animal math training

[App page](https://appshunter.io/ios/app/animal-math-training/id6739468187)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PFD Calc free?

PFD Calc is free to download, with no in-app purchases.

### Is Animal math training free?

Animal math training is free to download, with no in-app purchases.

### Do PFD Calc or Animal math training have ads?

Both PFD Calc and Animal math training show ads.

### Which is updated more often, PFD Calc or Animal math training?

PFD Calc ships an update every 5 weeks, and Animal math training fortnightly. Most recently, PFD Calc was updated on September 17, 2026 and Animal math training on May 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*